摘要:
The present invention relates to a device for analyzing the quality of edible oils, in particular olive oil. Said device comprises a near-infrared light source (1), an olive oil sample holder (2), a near-infrared sensor (3) and an electronic card (6) for processing data and transmitting results, said device receiving the near-infrared spectrum transmitted from the olive oil sample (4) in the full range of 1200 nm to 2600 nm. The spectrum is then analyzed by a microcontroller contained in the electronic card (6), which applies mathematical filters and prediction models developed to predict the acid value and the levels of conjugated dienes and methyl ethers. The results are instantly transmitted to a display device such as a visual display unit or smartphone, using cable transmission means or wireless transmission means such as Bluetooth.
摘要:
A system (2) for the optical spectrophotometric assay of components in of a liquid sample (40) comprises an optical spectrophotometer (4) having an inspection zone (18) for receiving a sample for assay (40a); a radiation source (10) configured to generate optical radiation for supply into the inspection zone (18) to impinge on and thereby interact with a received sample for assay (40a); and a nebulizer (24) configured to discharge an aerosol (44) of the liquid sample (40) towards a one of one or more collection surfaces (32) located spaced apart from the nebulizer (24) and disposed to receive discharged aerosol (44) to form the sample for assay (40a).
摘要:
Device and methods for detecting/quantifying a fluorescent taggant in a liquid sample. Generally, the liquid samples are fuels having low concentrations (measured in ppb) of a fluorescent taggant. The detection/quantification generates a predicted concentration of the fluorescent tagging compound using a process selected from the group of a multivariate process, a background subtraction process, or a combination of both. The invention addresses the detection of an adulteration of gasoline and diesel fuels.
摘要:
This invention relates to a method that allows for the differentiation of isolates of commonly encountered bacteria that contain specific antibiotic-resistance genes from similar isolates that do not harbor the gene. More particularly, the invention relates to a method that utilizes an automated rapid platform system that employs intrinsic fluorescence, optical data analysis, and artificial intelligence methods to analyze multi-dimensional optical characteristics of bacterial strains.
摘要:
Systems, methods, and apparatuses are provided for identifying an optimal spectral match and potentially display the compared spectra. A sample spectrum of a sample substance can be compared to reference spectra to identify matches, thereby determining possibilities for what the sample substance is. Correction parameter(s) may be used for the sample spectrum and/or the reference spectrum. Initial value(s) for the correction parameter(s) can be applied to the sample spectrum and/or a reference spectrum, and a similarity score can be determined. Value(s) for the correction parameter(s) can be updated and iteratively improved to provide an optimal similarity score that satisfies a convergence criterion. Data about the reference substances having optimal similarity scores that are above a threshold can be output to a user, e.g., the reference spectra can overlay the sample spectrum. A user can then make a final determination of which reference substance corresponds to the sample substance.
摘要:
An approach to noninvasively and remotely detect the presence, location, and/or quantity of a target substance in a scene via a spectral imaging system comprising a spectral filter array and image capture array. For a chosen target substance, a spectral filter array is provided that is sensitive to selected wavelengths characterizing the electromagnetic spectrum of the target substance. Elements of the image capture array are optically aligned with elements of the spectral filter array to simultaneously capture spectrally filtered images. These filtered images identify the spectrum of the target substance. Program instructions analyze the acquired images to compute information about the target substance throughout the scene. A color-coded output image may be displayed on a smartphone or computing device to indicate spatial and quantitative information about the detected target substance. The system desirably includes a library of interchangeable spectral filter arrays, each sensitive to one or more target substances.
摘要:
A method of analysing a sample including a microorganism of interest. The method includes exposing the sample to an antimicrobial; after exposing the sample to the antimicrobial, applying an absorption-based and/or scattering-based spectroscopic technique to the sample to obtain spectrum data whose spectral profile has been influenced by exposing the sample to the antimicrobial, wherein applying the absorption-based and/or scattering-based spectroscopic technique to the sample includes irradiating the sample with UV-Vis radiation; obtaining information regarding the susceptibility/resistance of the microorganism of interest to the antimicrobial from the spectrum data. The absorption-based and/or scattering-based spectroscopic technique may be applied to the sample no more than 60 minutes after the initial exposure of the sample to the antimicrobial. The method may be useful to obtain information regarding the susceptibility/resistance of a bacterium, such as a bacterium responsible for causing a UTI, to an antibiotic in a rapid and reliable manner.
摘要:
Procédé de calibration d'un appareil de spectroscopie infrarouge pour réaliser des spectres en vue de déterminer la concentration d'un composant C1 dans un fluide F1 d'un animal, qui comprend les étapes consistant à : a)- se munir d'échantillons dudit fluide F1 et d'un fluide F2 différent du fluide F1, provenant de chaque animal appartenant à un lot d'animaux représentatifs, le fluide F2 contenant des quantités décelables d'au moins un composant C2 qui a une relation directe ou indirecte avec une voie métabolique du composant C1, b)- mesurer la concentration du composant C1 dans les échantillons de fluide F1 à l'aide d'une méthode de référence, c)- réaliser le spectre d'absorption IR complet des échantillons de fluide F2, d)- identifier sur les spectres d'absorption des échantillons de fluide F2, les plages spectrales qui sont corrélées avec la concentration du composant C1 dans les échantillons de fluide F1, et e)- calculer en se fondant sur au moins une desdites plages spectrales corrélées, un modèle mathématique prédictif de la concentration du composant C1 dans le fluide F1. Le procédé s'applique à la prédiction des teneurs de composants d'un premier fluide à partir du dosage de composants dans un autre fluide. Il s'applique aussi à l'identification de composés impliqués dans une voie métabolique.
摘要:
An exemplary embodiment can be an apparatus for real-time, in situ measurement of gas compositions and heating values. The apparatus includes a near infrared sensor for measuring concentrations of hydrocarbons and carbon dioxide, a mid infrared sensor for measuring concentrations of carbon monoxide and a semiconductor based sensor for measuring concentrations of hydrogen gas. A data processor having a computer program for reducing the effects of cross-sensitivities of the sensors to components other than target components of the sensors is also included. Also provided are corresponding or associated methods for real-time, in situ determination of a composition and heating value of a fuel gas.
摘要:
A system (102) for determining properties of a sample (114) comprises a LIBS detector (104,106) and an infra-red absorption detector (108,110) for interrogating a sample (114) to generate LIBS spectral data and infra-red absorption spectral data respectively; and a data processor (112) adapted to apply at least one chemometric prediction model, each constructed to link, preferably quantitatively link, features of both LIBS and absorption spectral data to a different specific property of the sample, to a combined dataset derived from at least portions of both the LIBS and the absorption data to generate therefrom a determination, preferably a quantitative determination, of the specific property linked by that model.